CN106321518A - Centrifugal-pump pump cover for preventing particles entering sealing device - Google Patents
Centrifugal-pump pump cover for preventing particles entering sealing device Download PDFInfo
- Publication number
- CN106321518A CN106321518A CN201610798714.0A CN201610798714A CN106321518A CN 106321518 A CN106321518 A CN 106321518A CN 201610798714 A CN201610798714 A CN 201610798714A CN 106321518 A CN106321518 A CN 106321518A
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- CN
- China
- Prior art keywords
- pump
- pump cover
- sealing device
- circumferential grooves
- centrifugal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention provides a centrifugal-pump pump cover for preventing particles entering a sealing device. The centrifugal-pump pump cover comprises a pump cover body. Two or three circles of circumferential grooves are formed in the pump cover body. Fluids stagnated in a boundary layer of the surface of the pump cover body can be sucked through the circumferential grooves. Flowing of the fluids on the surface of the pump cover body is enhanced, and furthermore, secondary eddy generated in a pump cavity between a rear cover plate of an impeller and the pump cover body is reinforced. The secondary eddy can hinder the particles from entering a seal cavity, and the reinforced secondary eddy can hinder more particles and even cast the particles out of the pump cavity, so that the particles are prevented from entering the sealing device. Meanwhile, due to the fact that the second eddy is reinforced through the circumferential grooves, the pressure of the fluids in the pump cavity can be lowered, so that axial force applied to the rear cover plate is reduced, and therefore through the structure, it is helpful to reduce axial force of a pump; and the effect that the pump operates more stably is achieved.
Description
Technical field
The present invention relates to pump technology field, especially relate to a kind of centrifugal pump pump preventing granule from entering sealing device
Lid.
Background technology
In the industrial production, commonly used centrifugal pump transferring raw material medium, but containing suspended particulate substance in many raw materials
(floating thing), brings the biggest difficulty to the sealing device of centrifugal pump.Owing to suspended particulate substance (floating thing) quantity is many, volume is little,
The sealing chamber of centrifugal pump can be flowed into raw material liq, make seal failure, cause raw material to leak, reduce mechanical seal
In service life, add maintenance cost.
Summary of the invention
It is an object of the invention to provide a kind of centrifugal pump cover preventing granule from entering sealing device for the problems referred to above,
On the premise of avoiding using complex appts or structure, prevent the sealing device hindering particulate matter to enter centrifugal pump, improve sealing ring
Border, improves reliability and service life that tool seals, reduces maintenance cost.
The technical scheme is that a kind of centrifugal pump cover preventing granule from entering sealing device, including centrifugal pump pump
Lid, described pump cover has some circle circumferential grooves.
In such scheme, described pump cover has 2～4 circle circumferential grooves.
In such scheme, described circumferential grooves is positioned at pump cover and contacts the middle inner side of anchor ring with fluid.
In such scheme, the width of described circumferential grooves is 0.05～0.1* (D-D0), the degree of depth is 0.05～0.15*
(D-D0), D is the external diameter that pump cover contacts anchor ring with fluid, D0For anchor ring internal diameter.
In such scheme, the cross sectional shape of described circumferential grooves can be rectangle or triangle.
The invention has the beneficial effects as follows: compared with prior art, the present invention, by opening circumferential grooves on pump cover, utilizes ditch
Groove sucks in boundary region the fluid of stagnation, and the fluid near groove opening can be made to accelerate, and owing to defining new limit
Interlayer, the barometric gradient on pump cover surface will reduce, and fluid can greatly strengthen secondary vortex flow in less inverse pressure flowing, make
Obtain granule to be difficult to continue to move to annular seal space.Meanwhile, the fluid of impeller side obtains more kinetic energy, granule draging at fluid
Can accelerate under power to move to impeller outlet, pump chamber of dishing out under the effect of inertia force, flows with flow downstream.It addition, by
Enhancing secondary vortex flow in groove, the fluid pressure in pump chamber can reduce, and causes the axial force acting on back shroud to reduce, makes pump
Run more stable.Utilizing groove to strengthen flowing prevents granule from entering sealing device.
Accompanying drawing explanation
Fig. 1 is the structure sectional view of the pump cover of an embodiment of the present invention；
Fig. 2 is the pump cover dextrad view of an embodiment of the present invention；
Fig. 3 is the operation principle schematic diagram of the present invention.
In figure: 1. pump cover, 2. impeller, the 3. pump housing, 4. sealing device, 5. circumferential grooves.
Detailed description of the invention
With detailed description of the invention, the present invention is described in further detail below in conjunction with the accompanying drawings, but protection scope of the present invention
It is not limited to this.
Fig. 1 and Fig. 2 show a kind of embodiment party of the centrifugal pump cover preventing granule from entering sealing device of the present invention
Formula, described in prevent granule enter sealing device centrifugal pump cover, including centrifugal pump cover, described pump cover 1 has 2～4 circle
Circumferential grooves 5, has 3 circle circumferential grooves 5 on described pump cover 1 in the present embodiment；Described circumferential grooves 5 is positioned at pump cover 1 and stream
The middle inner side of body contact anchor ring.The width of described circumferential grooves 5 is 0.05～0.1* (D-D0), the degree of depth is 0.05～0.15*
(D-D0), D is the external diameter that pump cover 1 contacts anchor ring with fluid, D0For anchor ring internal diameter.
The cross sectional shape of described circumferential grooves 5 can be the shape such as rectangle or triangle so that it is more laminating machining tool
Cutter head, it is easier to processing.
As it is shown on figure 3, due to the rotation of centrifugal pump impeller 2, create clockwise secondary in the pump chamber residing for pump cover 1
Eddy current.In the side near impeller 2, fluid moves along baric flow, and eddy current is reinforced.And in the side near pump cover 1, due to pump cover 1
Being stationary parts, its surface side is dispersed with thicker boundary region, viscous friction and inverse pressure and hinders travelling forward of fluid.And
The eddy current of decay can make granule be easier to enter sealing device, brings hidden danger.
The present invention by open channels on pump cover 1, utilizes circumferential grooves 5 to suck in boundary region the fluid of stagnation, makes
Obtain the fluid near circumferential grooves 5 opening to accelerate, and owing to defining new boundary region, the barometric gradient on pump cover 1 surface will
Reducing, fluid can greatly strengthen secondary vortex flow in less inverse pressure flowing so that granule is difficult to continue to transport to annular seal space
Dynamic.Meanwhile, the fluid of impeller 2 side obtains more kinetic energy, and granule can accelerate to transport to impeller outlet under the drag force of fluid
Dynamic, pump chamber of dishing out under the effect of inertia force, flows with flow downstream.
Owing to circumferential grooves 5 enhances secondary vortex flow, the fluid pressure in pump chamber can reduce, and causes after acting on impeller 2
The axial force of cover plate reduces, and improves the stability of pump operation.
Present invention achieves on the premise of avoiding using complex appts or structure, prevent from hindering particulate matter to enter centrifugal pump
Sealing device, improve sealed environment, improve reliability and service life that tool seals, reduce the target of maintenance cost.
It is to be understood that, although this specification describes according to each embodiment, but the most each embodiment only comprises one
Individual independent technical scheme, this narrating mode of description is only that for clarity sake those skilled in the art should will say
Bright book can also form those skilled in the art permissible through appropriately combined as an entirety, the technical scheme in each embodiment
Other embodiments understood.
The a series of detailed description of those listed above is only for illustrating of the possible embodiments of the present invention,
They also are not used to limit the scope of the invention, all Equivalent embodiments made without departing from skill of the present invention spirit or change
Should be included within the scope of the present invention.
Claims (5)
1. prevent granule from entering a centrifugal pump cover for sealing device, including centrifugal pump cover, it is characterised in that described pump cover
(1) some circle circumferential grooves (5) are had on.
A kind of centrifugal pump cover preventing granule from entering sealing device the most according to claim 1, it is characterised in that described
2～4 circles circumferential grooves (5) are had on pump cover (1).
A kind of centrifugal pump cover preventing granule from entering sealing device the most according to claim 1, it is characterised in that described
Circumferential grooves (5) be positioned at pump cover (1) and contact the middle inner side of anchor ring with fluid.
A kind of centrifugal pump cover preventing granule from entering sealing device the most according to claim 1, it is characterised in that described
The width of circumferential grooves (5) be 0.05～0.1* (D-D0), the degree of depth is 0.05～0.15* (D-D0), D is pump cover (1) and fluid
The external diameter of contact anchor ring, D0For anchor ring internal diameter.
A kind of centrifugal pump cover preventing granule from entering sealing device the most according to claim 1, it is characterised in that described
The cross sectional shape of circumferential grooves (5) can be rectangle or triangle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610798714.0A CN106321518B (en) | 2016-08-31 | 2016-08-31 | A kind of centrifugal pump cover for preventing particle from entering sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610798714.0A CN106321518B (en) | 2016-08-31 | 2016-08-31 | A kind of centrifugal pump cover for preventing particle from entering sealing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106321518A true CN106321518A (en) | 2017-01-11 |
| CN106321518B CN106321518B (en) | 2019-01-15 |
Family
ID=57787227
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610798714.0A Active CN106321518B (en) | 2016-08-31 | 2016-08-31 | A kind of centrifugal pump cover for preventing particle from entering sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106321518B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109340126A (en) * | 2018-12-18 | 2019-02-15 | 江苏台合达环保设备有限公司 | A kind of self priming pump |
| CN110821819A (en) * | 2019-10-28 | 2020-02-21 | 宝鸡市隆庆金属材料制品厂 | Stainless steel pump cover of fluid pump, fluid pump and machining method of pump cover |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4349322A (en) * | 1978-02-14 | 1982-09-14 | Staehle Martin | Cooling a motor of a centrifugal pump for conveying liquids with deposited solids |
| CN87203854U (en) * | 1987-03-21 | 1987-12-26 | 郭宝权 | Centrifugal pump impeller capable of automatic balancing axial force |
| CN2721920Y (en) * | 2004-08-06 | 2005-08-31 | 大连深蓝泵业有限公司 | Self-suction pump |
| CN201934317U (en) * | 2011-01-11 | 2011-08-17 | 福建省福安市力德泵业有限公司 | Pump for paraffin wax and asphalt |
-
2016
- 2016-08-31 CN CN201610798714.0A patent/CN106321518B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4349322A (en) * | 1978-02-14 | 1982-09-14 | Staehle Martin | Cooling a motor of a centrifugal pump for conveying liquids with deposited solids |
| CN87203854U (en) * | 1987-03-21 | 1987-12-26 | 郭宝权 | Centrifugal pump impeller capable of automatic balancing axial force |
| CN2721920Y (en) * | 2004-08-06 | 2005-08-31 | 大连深蓝泵业有限公司 | Self-suction pump |
| CN201934317U (en) * | 2011-01-11 | 2011-08-17 | 福建省福安市力德泵业有限公司 | Pump for paraffin wax and asphalt |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109340126A (en) * | 2018-12-18 | 2019-02-15 | 江苏台合达环保设备有限公司 | A kind of self priming pump |
| CN110821819A (en) * | 2019-10-28 | 2020-02-21 | 宝鸡市隆庆金属材料制品厂 | Stainless steel pump cover of fluid pump, fluid pump and machining method of pump cover |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106321518B (en) | 2019-01-15 |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20181108 Address after: 211500 10 Tengfei Road, Xiong Zhou Industrial Zone, Liuhe District, Nanjing, Jiangsu Applicant after: Nanjing blue Ao environmental protection equipment Co., Ltd. Address before: No. 301, Xuefu Road, Jingkou District, Zhenjiang, Jiangsu Province Applicant before: Jiangsu University |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |